设置比如icc的
set_delay_calculation # set_delay_calculation
[-arnoldi] (use Arnoldi for given pins and ports)
[-elmore] (use Elmore for given pins and ports)
[-clock_arnoldi] (use Arnoldi for clock network pins and ports)
我这只是说的是RC model的变化, 还有一些scaling 设置,比如
set_delay_estimation_options # set delay estimation coefficients
set_extraction_options # set extraction options